This is exactly why I changed the motor arm method is the Naza assistant. Instead of the centre stick command I use the hold throttle straight Down setting. This way I'm not input anything other Than throttle down on landing.

Last two outings my phantom vision will surge when i go to shut it down. Sticks both down and to the middle.
Causes the p2v to try to tip over.

I just installed my Rotorpixel gimbal. Not sure if it was related.

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This happened to me twice. Once I was able to just hold it in place. The second time, I'd just landed it showing someone how cool it is, and all of a sudden it powers up and tries to take off. In that millisecond it happened, I saw it flying off in my head and crashing into some kid or causing an accident on a local road a mile away and something bad, so before it got more than 3 feet off the ground, I swatted it like a bug and flipped it upside down. Stung the fingers a bit. Glad I had gloves on! There it sat upside down in a parking lot, motors trying to go full power. I couldn't figure out for the life of me what'd happened.....then it dawned on me. While I was busy talking to this guy, I inadvertently turned off the radio. The P2V was still running on the ground and went into RTH mode....which was exactly what it was suppose to do! I felt like an idiot but only trashed the tops of the props! It's flown fine since.